Kramer Protocol 2000 - Kramer VP-4x1 CS User Manual

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Kramer Protocol 2000

The Kramer Protocol 2000 RS-232/RS-485 communication uses four bytes of
information as defined below. All the values in the table are decimal, unless
otherwise stated.
MSB
0
7
1st byte
1
7
2nd byte
1
7
3rd byte
1
7
4th byte
1st BYTE:
D – "DESTINATION":
1 - for sending to the PC (from the switcher).
N5...N0 – "INSTRUCTION"
The function that is to be performed by the switcher(s) is defined by the INSTRUCTION (6 bits). Similarly, if a function is
performed via the machine's keyboard, then these bits are set with the INSTRUCTION NO., which was performed. The
instruction codes are defined according to the table below (INSTRUCTION NO. is the value to be set for N5...N0).
2nd BYTE:
When switching (ie. instruction codes 1 and 2), the INPUT (7 bits) is set as the input number which is to be switched.
Similarly, if switching is done via the machine's front-panel, then these bits are set with the INPUT NUMBER which was
switched. For other operations, these bits are defined according to the table.
3rd BYTE:
When switching (ie. instruction codes 1 and 2), the OUTPUT (7 bits) is set as the output number which is to be switched.
Similarly, if switching is done via the machine's front-panel, then these bits are set with the OUTPUT NUMBER which
was switched. For other operations, these bits are defined according to the table.
4th BYTE:
Used to address machines in a system via their device numbers. When several machines are controlled from a single
serial port, they are usually configured together with each machine having an individual machine number. If the OVR bit
is set, then all machine numbers accept (implement) the command, and the addressed machine replies. For a single
machine controlled via the serial port, always set M4...M0 = 1, and make sure that the machine itself is configured as
MACHINE NUMBER = 1.
VP-4x1CS - Kramer Protocol 2000
DESTINATION
D N5
6 5
INPUT
I6 I5
6 5
OUTPUT
O6 O5
6 5
OVR X
6 5
Bit 7 – Defined as 0.
0 - for sending information to the switchers (from the PC);
Bit 7 – Defined as 1.
I6...I0 – "INPUT".
Bit 7 – Defined as 1.
O6...O0 – "OUTPUT".
Bit 7 – Defined as 1.
Bit 5 – Don't care.
OVR – Machine number override.
M4...M0 – MACHINE NUMBER.
INSTRUCTION
N4 N3
4 3
I4 I3
4 3
O4 O3
4 3
MACHINE NUMBER
M4 M3
4 3
N2 N1
2 1
I2 I1
2 1
O2 O1
2 1
M2 M1
2 1
LSB
N0
0
I0
0
O0
0
M0
0
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